Ibrahim (may Allah have mercy on him) said that Sayyiduna Ali and Sayyiduna Zayd (may Allah be pleased with them both) said: A polytheist neither excludes (others) nor inherits.
Abdullah (may Allah be pleased with him) said: "He excludes (others), but he does not inherit."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12260